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We found 35 dictionaries with English definitions that include the word Down syndrome:
Click on the first link on a line below to go directly to a page where "Down syndrome" is defined.

General (19 matching dictionaries)

1. Down syndrome: Merriam-Webster.com [home, info]
2. Down syndrome: Oxford Learner's Dictionaries [home, info]
3. Down syndrome: American Heritage Dictionary of the English Language [home, info]
4. Down syndrome: Collins English Dictionary [home, info]
5. Down syndrome: Vocabulary.com [home, info]
6. Down syndrome: Macmillan Dictionary [home, info]
7. Down syndrome, down-syndrome: Wordnik [home, info]
8. Down syndrome: Wiktionary [home, info]
9. Down syndrome: Infoplease Dictionary [home, info]
10. Down syndrome: Dictionary.com [home, info]
11. Down syndrome: UltraLingua English Dictionary [home, info]
12. Down Syndrome, Down-syndrome, Down syndrome: Wikipedia, the Free Encyclopedia [home, info]
13. Down syndrome: Rhymezone [home, info]
14. Down Syndrome: Encarta® Online Encyclopedia, North American Edition [home, info]
15. down syndrome: Free Dictionary [home, info]
16. down syndrome: Mnemonic Dictionary [home, info]
17. Down syndrome: LookWAYup Translating Dictionary/Thesaurus [home, info]
18. Down syndrome: Dictionary/thesaurus [home, info]

Computing (1 matching dictionary)

19. Down-syndrome, Down syndrome: Encyclopedia [home, info]

Medicine (14 matching dictionaries)

20. Down syndrome, Syndrome, Down: MedTerms.com Medical Dictionary [home, info]
21. Down Syndrome: Medical Dictionary [home, info]
22. Down syndrome: Merck Manuals [home, info]
23. down syndrome, syndrome, down: online medical dictionary [home, info]
24. Down syndrome: Health and Wellness Dictionary [home, info]
25. Down Syndrome: Specific Diseases/Disorders [home, info]
26. Down syndrome: Collaborative Hypertext of Radiology [home, info]
27. Down syndrome: MEDLINE plus Illustrated Medical Encyclopedia [home, info]
28. Down syndrome: Dictionary of Cancer Terms [home, info]
29. Down syndrome: Parents' Common Sense Encyclopedia [home, info]
30. Down-syndrome, Down syndrome: Medical dictionary [home, info]
31. Down syndrome: University of Maryland Glossary of Medical Terms [home, info]
32. Down syndrome, Syndrome, Down: Drug Medical Dictionary [home, info]
33. down syndrome: Hyperdictionary [home, info]

Slang (1 matching dictionary)

34. Down Syndrome: Urban Dictionary [home, info]

(Note: See down_syndromes for more definitions.)

Quick definitions from WordNet (Down syndrome) ▸ noun:  a congenital disorder caused by having an extra 21st chromosome; results in a flat face and short stature and mental retardation ▸ Also see down_syndromes ▸ Words similar to Down syndrome ▸ Usage examples for Down syndrome ▸ Idioms related to Down syndrome (New!) ▸ Words that often appear near Down syndrome ▸ Rhymes of Down syndrome ▸ Invented words related to Down syndrome